JP2023007095A - Resolver structure and method for suppressing entry of motor noise into winding part of resolver structure - Google Patents

Abstract

To solve a problem in which, since a conventional resolver structure does not have a structure for preventing motor noise from entering, the motor noise enters the resolver output.SOLUTION: A resolver structure and a method for suppressing the entry of motor noise into a winding part of a resolver structure include a resolver (104) provided in a motor (100) having motor stator windings (23), a non-magnetic ring (105) provided on the outer circumference (103A) of the annular stator (103) of the resolver (104), a magnetic mounting ring (106) provided on the outer circumference (105A) of the non-magnetic ring (105), and a large number of magnetic protrusions (107) partially formed on the mounting magnetic ring (106), and the magnetic protrusion (107) prevents motor noise (120) from the motor (100) from entering the detection winding (113) of the resolver (104).SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to a resolver structure and a method for suppressing motor noise from entering a winding portion of the resolver structure. The present invention relates to a novel improvement for providing a mounting magnetic ring having protrusions on the outer periphery of a stator via a non-magnetic ring.

Conventionally, patent publications showing a configuration for suppressing entry of external noise from a motor or the like used in the past into a resolver include the configuration of Patent Document 1 shown in FIGS. 3 and 4, and FIG. The configuration of Patent Document 2 shown in can be mentioned.
That is, the configuration shown in FIGS. 3 and 4 is the configuration disclosed in Patent Document 1, in which one end of each bobbin 2 arranged in the circumferential direction of the bobbin support frame 12 of the stator main body 1 is made of metal. The rows of bobbins 2 arranged in the circumferential direction of the bobbin support frame 12 are surrounded by side shields 42 made of metal. This isolates the stator winding 23 of each bobbin 2 from magnetic field noise and electric field noise.
The mounting pin 3 formed on the bobbin 2 is inserted into the pin hole 41a of the end shield 41, and the mounting pin 3 is thermally deformed so that the shape of the tip portion of the mounting pin 3 becomes larger than the inner diameter of the pin hole 41a. In this configuration, the shield body 4 is fixed to the stator body 1.

5, which shows another conventional configuration, includes a stator winding 23 wound around a plurality of projecting magnetic poles 5 of a ring-shaped stator 1, and stator windings 23 provided on both end surfaces 50 and 51 of the ring-shaped stator 1. In the resolver stator structure composed of the winding sealing resin 52 for covering the windings 23, the shielding metal plate 53 or the shielding metal plating provided on the surface of the winding sealing resin 52 protects the coil from the outside. is a configuration and method for preventing magnetic noise from
A motor case 54 is connected to the aforementioned shielding metal plate 53 .

JP 2013-165608 A JP 2016-127614 A

Since the conventional resolver is configured as described above, there are the following problems.
That is, in the case of the first conventional configuration shown in FIGS. 3 and 4, a ring-shaped shield body 4 is provided for the stator body 1, and the shield body 4 is attached to the stator via mounting pins 3 provided on the bobbin 2. The head of the mounting pin 3 provided on the main body 1 and protruding from the shield main body 4 had to be thermally crimped.
Therefore, shielding the stator winding 23 requires a large number of parts and assembly man-hours, resulting in an increase in cost.

Further, in the case of the second conventional configuration shown in FIG. was provided with a shielding metal plate 53 .
Therefore, resin for winding sealing must be injected between the stator winding 23 and the shielding metal plate 53, which is a serious obstacle in the manufacturing process.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems. An object of the present invention is to provide a resolver structure in which a mounting magnetic ring having projections is provided via a non-magnetic ring, and a method for suppressing motor noise from entering the windings of the resolver structure.

A resolver structure according to the present invention includes a resolver provided in a motor having a motor stator winding, a non-magnetic ring provided on the outer circumference of a ring-shaped stator of the resolver, and a mounting magnetic ring provided on the outer circumference of the non-magnetic ring. A configuration comprising a ring and a large number of magnetic projections partially formed on the mounting magnetic ring, wherein the magnetic projections suppress motor noise from the motor from entering the detection winding of the resolver. In addition, the magnetic protrusion and the mounting magnetic ring are integrally configured to form an L-shaped cross section, and the intrusion of motor noise into the winding portion of the resolver structure according to the present invention is suppressed. The method comprises: a resolver provided in a motor having a motor stator winding; a non-magnetic ring provided on the outer circumference of an annular stator of the resolver; a mounting magnetic ring provided on the outer circumference of the non-magnetic ring; a magnetic projection part partially formed in a large number on a mounting magnetic ring, and a method for suppressing motor noise from the motor from entering the detection winding of the resolver by the magnetic projection part, and , the magnetic protrusion and the mounting magnetic ring are integrated to form an L-shaped cross section.

INDUSTRIAL APPLICABILITY The resolver structure and the method for suppressing the entry of motor noise into the winding portion of the resolver structure according to the present invention are configured as described above, so that the following effects can be obtained.
That is, a resolver provided in a motor having a motor stator winding, a non-magnetic ring provided on the outer circumference of the annular stator of the resolver, a mounting magnetic ring provided on the outer circumference of the non-magnetic ring, and the mounting ring. a large number of magnetic protrusions partially formed on the magnetic ring for the sensor, and a configuration and method for suppressing the entry of motor noise from the motor into the detection winding of the resolver by the magnetic protrusions. Therefore, it is possible to concentrate the motor noise, which may cause resolver error, on the magnetic protrusion of the mounting magnetic ring, suppress the influence of the motor noise on the detection winding, and maintain the accuracy of the resolver output signal.
In addition, since the magnetic projections and the mounting magnetic ring are integrated to form an L-shaped cross section, each magnetic projection and its tip act as an antenna and reach the circumference of the ring-shaped stator. Motor noise can be collected smoothly and dropped to the ground.

FIG. 2 is an arrangement configuration diagram of a motor and a resolver for showing the resolver structure according to the embodiment of the present invention; 2 is a left side view of the resolver of FIG. 1; FIG. FIG. 3 is an exploded perspective view showing a resolver stator having a first conventional configuration; FIG. 4 is a perspective view showing a state after assembling the resolver stator of FIG. 3 ; It is a sectional view showing the 2nd conventional composition.

A resolver structure and a method for suppressing motor noise intrusion into a winding portion of the resolver structure according to the present invention are provided to prevent motor noise from entering the detection winding of the resolver winding portion. is to provide a mounting magnetic ring having a protrusion via a non-magnetic ring.

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a resolver structure and a method for suppressing motor noise from entering a winding portion of the resolver structure according to the present invention will be described below with reference to the drawings.
Identical or equivalent parts to those of the conventional example will be described using the same reference numerals.
Reference numeral 100 in FIG. 1 denotes a motor such as a servomotor, and a motor stator winding 23 for rotationally driving a motor rotor (not shown) is provided on a peripheral edge 102A of a motor stator 101 of the motor 100. there is

The motor 100 is provided with a resolver 104 having at least a ring-shaped stator 103 in which a well-known rotor (not shown) is provided.
Although not shown, the resolver 104 and the motor 100 may be attached directly to the motor 100 having the motor stator winding 23 (generally practiced and well-known), or may be attached adjacently. The resolver 104 is provided by any one mounting configuration of , and a spaced mounting configuration.
However, the most commonly used resolver motor has a structure in which the resolver 104 is directly mounted on the motor shaft 100A of the motor 100 to be integrated therewith.

Next, the detailed configuration of the resolver 104 will be described.
A non-magnetic ring 105 made of a non-magnetic material such as resin or metal is provided on the outer circumference 103A of the annular stator 103 of the resolver 104 .
The outer circumference 105A of the non-magnetic ring 105 is provided with a mounting magnetic ring 106 having a large number of partially independent magnetic protrusions 107 along the circumference thereof. The mounting magnetic ring 106 is used.
On the left side of the mounting magnetic ring 106 in FIG. 1, that is, on the motor 100 side, the magnetic protrusion 107 integrally formed with the mounting magnetic ring 106 protrudes along the axial direction P. It is That is, the magnetic protrusions 107 are not formed continuously in a circular shape along the circumference of the mounting magnetic ring 106, but are formed at a predetermined angular interval as shown in the drawing. As shown in FIG. 1, the A′-A′ cross section has an L-shaped cross section only when the magnetic protrusion 107 and the mounting magnetic ring 106 are integrated into the cross section.

That is, since the magnetic protrusion 107 is integrated with the mounting magnetic ring 106, as described above, the magnetic protrusion 107 and the mounting magnetic ring 106 are integrally formed into an L shape when viewed in cross section. The magnetic protrusion 107 is formed integrally with a portion of the mounting magnetic ring 106 .
2 is a left side view of the resolver 104 in FIG. 1, and the magnetic projections 107 are provided at predetermined angular intervals of the mounting magnetic ring 106. In the case of FIG. (many).

The winding portion 110 of the resolver 104 includes a large number of protruding magnetic poles 111 integrally formed protruding inside the annular stator 103 at predetermined angular intervals. and a stator winding 114 made up of the detection winding 113 .
Further, a long hole 115 and a notch 116 are provided on the peripheral edge of the magnetic ring 106 for attachment, which are required when the resolver 104 is attached to the motor 100 .

In the above-described configuration, when the motor 100 is driven, if the motor noise 120 mainly composed of the leakage magnetic flux generated from the motor stator winding 23 leaks to the resolver 104 side, the tip 107A of each magnetic projection 107 becomes the ring shape. Since the stator 103 protrudes closer to the motor 100 than the thickness T of the stator 103 and is close to the motor 100, the magnetic protrusion 107 functions as an antenna, and the motor noise 120 passes through the magnetic protrusion 107 to the ground side (not shown). and can be prevented from entering the detection winding 113 of the resolver 104, thereby improving the accuracy of the resolver output.

According to the resolver structure and the method for suppressing the entry of motor noise into the winding portion of the resolver structure according to the present invention, the mounting magnetic ring having an L-shaped cross section provided on the outer periphery of the ring-shaped stator of the resolver has a large number of magnetic protrusions. is formed, leakage magnetic flux from the motor is suppressed from entering the detection winding of the resolver, so that the resolver output of the resolver can be made highly accurate.

23 Motor stator winding 100 Motor 100A Motor shaft 101 Motor stator 102 Motor with resolver 102A Periphery 103 Annular stator 103A Periphery 104 Resolver 105 Non-magnetic ring 105A Periphery 106 Magnetic ring for mounting 107 Magnetic projection 107A Tip 110 Winding 111 Protruding magnetic pole 112 excitation winding 113 detection winding 114 stator winding 115 long hole 116 notch 120 motor noise P axial direction T thickness

Claims (4)

a resolver (104) provided in a motor (100) having motor stator windings (23); a magnetic mounting ring (106) provided on the outer circumference (105A) of the non-magnetic ring (105); a large number of magnetic protrusions (107) partially formed on the magnetic mounting ring (106); with
A resolver structure characterized in that the magnetic protrusion (107) prevents the motor noise (120) from the motor (100) from entering the detection winding (113) of the resolver (104). . 2. The resolver structure according to claim 1, wherein said magnetic protrusion (107) and said mounting magnetic ring (106) are integrated to form an L-shaped cross section. a resolver (104) provided in a motor (100) having motor stator windings (23); a magnetic mounting ring (106) provided on the outer circumference (105A) of the non-magnetic ring (105); a large number of magnetic protrusions (107) partially formed on the magnetic mounting ring (106); using
A winding of a resolver structure, characterized in that the magnetic protrusion (107) suppresses the motor noise (120) from the motor (100) from entering the detection winding (113) of the resolver (104). A method of suppressing the entry of motor noise into the part. 4. The magnetic protrusion (107) and the mounting magnetic ring (106) integrally form an L-shaped cross-section to reduce motor noise to the winding portion of the resolver structure according to claim 3. Intrusion control method.

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